Tyrannosaurus rex

[GuateGojira]

(11-29-2018, 07:08 PM)Smilodon-Rex Wrote: Guate, have you heard about the UCMP 137538？it's said it would be the biggest T-rex individual according to calculation

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 The UCMP 137538 specimen's photo

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 In fact, ucmp 137538'body-size is based on sue or stan to calculate and estimate

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The size comparison between different T-rex individuals

I think that the firs estimation of that huge size for UCMP 137538 was made by Dr Gregory Paul (don't remember exactly when) but it was discarded because is based in a single toe bone.

There is also the specimen UCMP 118742, also presente by Dr Paul in his book "Predatory Dinosaurs of the World" and in page 343 he estimated this T. rex at c.13.6 m long and c.12 tones, but again new studies shows that the maxilia is no larger than the one from "Sue", so is not a giant. This is a draw of the fossil:

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This compared with "Sue":

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The problem to calculate the size in such small or fragmentary bones is that there is a huge range of variations in the living animals that UCMP 137538 could be just a T. rex with relatively large feet and that's it. Also, as we don't have a direct modern reference, it will be a huge speculation to estimate the size of an animal with such a small bones.

From my part the T.rex FMNH PR 2081 - "Sue" is still the largest one, although RSM P2523.8 - "Scotty" may be slightly heavier. Reply